Improvement in wagon and carriage brakes



J. J. HARTMAN.

Wagon and Carriage-Brakes.

N0 133,643. I Y Pte nted Dec. 3,1872.

G F I M A! if llllHHllH l lll'llllllllfllll lllllf" WITNESSESI INVENTORIf 9. dam

AM. PHOTO-LITHDGRAPHIC CIZMXMSBORNE'S PflDGES-i) ing rod, N, beneath thetongue.

PATENT Orrron JOHN J. HARTMAN, on sr. LOUIS, MIssoUnI.

IMPROVEMENT IN. WAGON AND CARRIAGE BRAKES.

Specification forming part of Letters Patent No. 133,643, dated December3, 1872.

To all 'whom it may concern.-

Be it known that I, JOHN J HARTMAN, of y the city and county of .St.Louis and State of Missouri, have invented certain Improvements in Wagonand Carriage Brakes, of which the following is a specification:

My invention relates more especially to an arrangement by which thedriver is enabled to cause the holding back of the horses to apply thebrake, the brake mechanism being otherwise locked so that the backpressure of the neck-yoke has no action upon it. The brake is locked bya spring-bolt connected to a bell-- crank, "and that is withdrawn by acord extending to the driver to unlock the brake and allow the backpressure of the horses to put it in action. My invention also relates tothe general arrangement and combination of parts forming the brakeapparatus.

Figure l is a longitudinal section at the line as .r'. Fig. 2 is abottom yiew of part of the wagon with my brake attached.

. The brake in both figures is shown locked with shoes not in contactwith the wheels.

A are the fore wheels of a wagon; B, the axle; (l, the bolster; D, thehounds; and E, the tongue. F .is the brake-bar slidin g in guides Gattached to the hounds. fare lugs" on the brakebar to prevent playendwise. H

are connectin g-rods extending from the brakebar to cranks h uponcrank-shaft I secured to the axle by journal-staples 2'. J is an arm atthe midlength of the crank-shaft I, connected by a link, J, to a spring,K, by which the brake-shoes F are drawn back from the wheels when thepressure of the horses ceases. L is an arm extending from the shaft Iopposite to that, J, and connected by a rod, M, to a slid- The rod Nslides endwise in staples n. O is a hold-back lug on the rod N toreceive the back pressure of the horses on the neck-yoke P. p is'theneck-yoke ring, that embraces the end of the tongue and bears againstthe lug'O. The forward end of the rod N passes through a strap orstaple, n, and has bolt-holes n n to receive a bolt, R, which passesthrough the tongue, and whose upper end is hinged'to a bell-crank block,S, fulcrumed at s to the top of the Y tongue. The block S has at itsupper corner a cord, T, passing to the driver, and by drawing on thiscord the bolt R is raised and drawn from the hole a or a. U isa spring,by which the bolt R is forced down when released from the action of thecord.

The operation is as follows: Ordinarily, the brake is in the positionshown in the figures, and is held in that position by the bolt Roccupying the hole a, so that the wagon maybe backed without the backpressure on the rod N putting the brakes in operation. When the driverwishes to apply the brakes he draws back the cord U and so draws up thebolt from the hole n and the back pressure of the horses forces back therod N, and draws forward the brake-bar so that the shoes are forcedagainst the wheels. Whenin this position the spring T acts on the bolt Rand forces it down into the hole a and holds the parts in the positionto which they had been forced by the back pressure--viz., with the brakein action. \Vhen the driver would release the wheels from the brake heagain draws the cord U and the bolt is drawn from the hole a, and as theback pressure of the horses ceases the spring K forces the brake-shoesfrom the wheels and the bolt It again drops into hole a.

I claim- 1. The sliding bar N provided with holdbaek lug O, incombination with a spring-bolt, R, bell-crank S, and cord T,substantially as and for the purpose set forth.

2. The combination and arrangement of the brake-bar F, guides G,"connecting-rods H, crank-shaft I, arms J L, spring K, rod M, sliding barN, bolt R, bell-crank block S, cord T, and spring U, substantially asand for the purposes set forth.

JOHN J. HARTMAN.

Witnesses:

SAML. KNIGHT, ROBERT BURNS.

